Working formatting of weights for nodes and edges

src/main.rs

@@ -1,11 +1,12 @@
 use reactionsystems::rsprocess::presets;
 
 fn main() {
-    // let now = std::time::Instant::now();
-    // println!("{}", now.elapsed().as_micros());
+    let now = std::time::Instant::now();
 
     match presets::run("testing/first.system".into()) {
 	Ok(_) => {},
 	Err(e) => {println!("{e}")}
     }
+
+    println!("{} milliseconds elapsed", now.elapsed().as_millis());
 }